@dean-jacinto
Did you find a way to fix this ?
I've got the same problem..

@ubiwan
Managed to verify game files and it said that All game files have been successfully validated.
As for the clip, it's basically this : https://discussions.ubisoft.com/topic/84397/unable-to-complete-the-mystery-world-event-the-body-in-glowecestrescire

@ubiwan
Hello !
I have the same issue. I tried clicking on your link to know how to verify the game files but it just redirects me to the support page.
I can check the game files but i don't know how to do it.
Thanks for the answers.

I have got the same problem...
Its annoying since it is the only thing i have left to complete ALL the maps...
Did you find any way of making it work ?
It seems patch 1.1.0 did not fix this, and it is not listed in the known issue...